| pes | Corel WordPerfect Program Editor Workspace Data |
| pest | PEST Data |
| pet | Corel WordPerfect PE Top Overflow |
| pet | ISOBuster Custom CD Menu Data |
| pet | SWAT Potential Evapotranspiration Input Data |
| pev | CompHEP Output File |
| pev | POSE Palm Event Data |
| pext | 4D Database for Mac External |
| pez | Prezi Desktop Presentation |
| pf | Microsoft Windows Prefetch Data |
| pfb | DESQview PFB Data |
| pfb | ParFlow Binary Data |
| pfc | Corel PercetFit Component |
| pfc | Pegasus Mail Messages Cache |
| pfco | Pipe Flow Expert Component Data |
| pfcolors | Pixelformer Colors Data |
| pfd | Alzex Personal Finance Data |
| pfd | Optima! 2.5 Document |
| pfd | PlanningForce Plan Data |
| pfd | ProForm Database Data Entry |
| pfe | Programmers File Editor Data |
| pfep | PronoFoot Expert Plus Data |
| pff | Adobe Photoshop Zoomify Image Stream |
| pfg | Altair FEKO Optimisation Information Data |
| pfg | Epson PIF Designer Frame |
| pfh | MarkNet N2601e Flash Data |
| pfi | Paragon Backup Index Data |
| pfi | Source Insight Project File Index |
| pfl | Corel Paint Shop Pro Fine Leather Preset |
| pfl | Printfil License Data |
| pflog | Peregrine ServiceCenter Database Update Log |
| pfpm | Pipe Flow Expert Pump Data |
| pfs | Altair FEKO POSTFEKO Session Data |
| pfs | First Publisher ART Data |
| pfsb | ParFlow Scattered Binary Data |
